Small Block Chevy - Gear Drive Installation
by Pat Kopecky

If you want the sound of a blower & more accurate timing maybe you should convert to a gear drive.

MVC-846S.JPG (28927 bytes)

 MVC-876S.JPG (48325 bytes)

MVC-853S.JPG (22773 bytes)

MVC-855S.JPG (20120 bytes)
Here are the parts, read directions several times !!! You will need a Harmonic balancer & gear puller

Choose one of the 5 cam offset bushings 0,1,2,3,5 degrees

This is the camshaft thrust bearing assembly

MVC-852S.JPG (28211 bytes)

MVC-863S.JPG (44741 bytes)

MVC-864S.JPG (38020 bytes)

MVC-865S.JPG (25337 bytes)

This is the thrust bearing on the cam gear.

 Note the engine is at TDC   marks are at 6 & 12 O clock

Pull middle gears out some & install cover so it determines clearance

If this touches the block grind till you have at least .005 - .075 clearance

MVC-866S.JPG (31347 bytes)

 MVC-867S.JPG (42661 bytes)

MVC-868S.JPG (47272 bytes)

MVC-835S.JPG (30025 bytes)

Instead of clearance putty I used red paint on masking tape.

The gears should be all flush 

The camshaft thrust bearing needs to be .005 - .010  from the cover

Scrape off old gasket, Tape on new gasket when using for clearance testing

MVC-833S.JPG (34669 bytes)

MVC-834S.JPG (24030 bytes)

MVC-836S.JPG (38232 bytes)

MVC-880S.JPG (34454 bytes)

I decided it was time to repaint my 10 year old fan

The finished product less than an hour of work

An old piece of  foam or cardboard holds items

 All done !!! Check for leaks & lets go for a ride.

Pat's Homepage